310 Messrs. Dalzell and Thorpe on Sulphur Bichloride. 



compound of this body with the terchloride of arsenic,, 2 AsCl 3 .Cl 2 S; 

 and according to Guthrie, it yields with the olefines compounds 

 of the general formula O H 2w CI 2 S. Hiibner and Gueront have 

 lately made an observation which tends also to support the idea 

 of the existence of this body*. A quantity of the pure chloride, 

 S 2 CI 2 , was placed in a strong freezing-mixture, and a current of 

 dry chlorine passed through it for some time, the excess of this 

 gas (that is, that existing merely in solution) being displaced by 

 a stream of dry carbon dioxide passed through for three or four 

 hours. Whilst still in the freezing-mixture, a small quantity of 

 the chloride was withdrawn and analyzed, when numbers were 

 obtained exactly agreeing with those required by the formula 

 C1 2 S. 



We have repeated this experiment with precisely the same 

 result. A quantity of pure S 2 CI 2 was first prepared : it boiled 

 constantly at 136-137°, and was analyzed with the following 

 results : — 



Found. 



Calculated. f A x 



I. II. 



S 2 . . 64 47-42 



CI 2 . ._71 52-58 52-48 52*67 

 135 100-00 



About 20 grms. of this liquid was then saturated with chlo- 

 rine, in the manner described by Hiibner and Gueront; after 

 the excess of chlorine was removed by carbon dioxide, it yielded 

 the following numbers on analysis :■ — 



Found. Dumas, Hiibner, 



Calculated. r A ^ and Gueront. 



r , I. II. * -, 



S . =32 31-07 — 31-9 30-5 



CI 2 . =71 68-93 69-25 69-06 68-1 69-3 



103 10000 100-0 99-8 



The existence of this body would therefore appear to be fully 

 proved ; for it is scarcely possible that such an agreement can be 

 the result of an accidental coincidence. 



From these experiments, therefore, we draw the same conclu- 

 sions as those deduced by Hiibner and Gueront, viz. that there 

 exist two compounds of chlorine and sulphur, analogous to the 

 oxides of hydrogen— first, a jion -volatile chloride having the for- 

 mula SCI 2 , corresponding to H 2 O, which on distillation splits 

 up into chlorine and the second chloride, S 2 C1 2 , corresponding 

 to peroxide of hydrogen, 



2C1 2 S = S 2 C1 2 -1-C1 2 . 



* Zeitschrift fur Chemie, No. 15, 18/0, p. 455. 



